Power supply



FIG. 1 is a perspective view of a power supply showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a front view thereof.

The broken lines shown represent unclaimed subject matter and form nopart of the claimed design. The difference in shading in the figuresindicates a contrast of appearance and does not depict any color,texture, or material.

CLAIM The ornamental design for a power supply, as shown and described.